The Difference Between a Biblical Unitarian and an Orthodox Trinitarian

Biblical unitarianism has an istial with john completely. I gues i g started throg what martin luther wanted to do with james and just get rid of the book of john. And probably the three thought the first job too would be one that they want to get rid of. So how come you not an arian and your biblical unitarian? Because one could argue that the arian arius is taking seriously the loghost and the word.